"Frightening" is an adjective, as it describes a noun, e.g. The ancient, gnarled tree made a frightening shape in the moonlight.
frighten is a verb. It can be used with both singular and plural subjects and objects, e.g.:They frighten meI frighten them
adverb
what part of speech is beneath
i want to know what part of speech is camping
the root word for frighten is fry
frighten is a verb. It can be used with both singular and plural subjects and objects, e.g.:They frighten meI frighten them
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The past tense of frighten is frightened.
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "lecturer" is a noun.